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Manual and Assembly Instructions are 30 pages long, Dated 1958. Manual includes part list and Circuit Diagram. Most of HFT-90 Tubers were sold as kits. Assembly instructions contain part list and assembly diagrams.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.